What if we invent time travel, but letting the past know has proven to be catastrophic, so no one showed up

I like that Hawking has the audacity to think that anyone would want to go to a party he’s throwing. What if time travelers go to all sorts of great parties throughout time and they were all like “Hawkings got a party? Pffft, laaaaaame.”

For anyone wondering, when asked about whether time travel was possible Hawkins responded;

We are all travelling forward in time anyway. We can fast forward by going off in a rocket at high speed and return to find everyone on Earth much older or dead. Einstein's general theory of relativity seems to offer the possibility that we could warp space-time so much that we could travel back in time. However, it is likely that warping would trigger a bolt of radiation that would destroy the spaceship and maybe the space-time itself. I have experimental evidence that time travel is not possible. I gave a party for time-travelers, but I didn't send out the invitations until after the party. I sat there a long time, but no one came.